35 results about "Single slip" patented technology

A frac plug having a mandrel body, a cap coupled to an upper end of the mandrel body and an outer housing coupled to a lower end of the mandrel body. A guide shoe is coupled to the outer housing. A single slip assembly is positioned between the cap and the guide shoe and surrounds the mandrel body. A sealing element is positioned between the cap and the single slip assembly and surrounds the mandrel body.

A utensil bundle assembly comprising a single strand having a first end and a second end and an intermediate portion therebetween, the intermediate portion forming a single slip knot through which the first and second ends pass, strand portions adjacent the first and second ends moveable through the slip knot to different locations to adjust the dimension of a loop portion formed by the strand and a placard including a front surface and a rear surface, the placard mounted to the loop portion of the strand with the front surface exposed.

A sheet feed device according to the present invention applied to a sheet processing machine is to extract paper sheets from a stack based on the principle of front edge separation. In order to improve the controllability for sheet separation of an extracting device at the stack 1 and transportation of the sheets, drive devices are provided separately for dual suction devices 2 and 6 led mutually about the mating parties in the sheet cycles. Therefore, the dual suction devices 2 and 6 are equipped with linear motors 12 and 15 to make lifting and linear motors 5 and 9 for the transporting movement. By this profitable method, the moving cycles can be established independently for the respective dual suction devices 2 and 6.

The invention discloses an automatic circular testing machine tool for a paper currency receiving machine. The automatic circular testing machine tool comprises a machine body, wherein the machine body is provided with a paper currency receiving hole, a paper currency storing cabin, a single paper currency twisting device, a paper current conveying mechanism and a paper currency conveying hole, wherein the paper currency receiving hole is used for receiving a paper currency rejected from a paper currency rejecting hole of the paper currency receiving machine and conveying the paper currency to the top of piled paper currencies in the paper currency storing cabin; the single paper currency twisting device is used for twisting a single paper currency away from the bottom of the piled paper currencies in the paper currency storing cabin and conveying the paper currency into the paper currency conveying mechanism; the paper currency conveying mechanism is used for conveying the paper currencies to the paper currency conveying hole; the paper currency conveying hole is used for conveying the paper currency into the paper currency receiving hole of the paper currency receiving machine. By adopting the automatic circular testing machine tool, paper currency receiving, authentication, rejection and the like can be finished automatically, manual work is replaced, a large amount of simple and repeated manual work is avoided, and the working efficiency is increased.

The invention relates to a single-slips double-acting non-cyclical setting whipstock hanging tool which is used for fixing a whipstock during window sidetracking in casings of oil and gas wells. The technical scheme of the invention is as follows: an upper connector, an upper cylinder body and a lower cylinder body are connected in sequence by threads; a stop screw for positioning is arranged between the upper cylinder body and the lower cylinder body; a limit gear is connected with a piston and a lower connector sequentially by using threads, the limit gear is connected with the piston and the piston is connected with the lower connector respectively by using two shear pins; a filtering net is arranged at an setting channel port of the upper connector, the anti-blocking slide sleeve is suspended at the lower port of the piston, and a steel ball is arranged in the lower connector; four slips bodies are symmetrically arranged on a T-shaped channel on the inclined surface of the piston, and the slips bodies are embedded with hard alloy teeth; and the upper cylinder body is connected with the limit gear through a unidirectional gear buckle. The hanging tool has the advantages of simpleness in operation, setting reliability, short construction period and reduced accident rate under the shaft; and the single-slips double-acting non-cyclical setting whipstock hanging tool disclosed by the invention is capable of finishing the setting hanging under the pump pressure of 20-25MPa, can bear 30T axial setting force and is used for window sidetracking in the well drilling operation.

The invention relates to the field of geotechnical engineering slope stability evaluation and prevention and treatment, in particular to a method for determining benching non-circular slip surfaces by displacement monitoring. The method includes: (1) surveying and mapping feature positions and parameters of a slope slip surface; (2) setting monitoring points of main slip surface displacement of a slope; (3) collecting and processing slope displacement monitoring data; (4) drawing a profile map of a slope main axis; (5) determining a slip mass distribution circle center and a slip surface position; and (6) drawing a complete main axis slip plane position. The method has the advantages that an initial slip surface needs not to be supposed, feature points that the slip surface passes in advance need not to be set, the slope slip surface is determined comprehensively just according to observation point displacement vector data, rear edge cracked wall position and shape and front edge shear opening position information, and determination of the slip surface position of a slip mass is no longer limited to a single slip circle and a circle center.

The invention discloses a corrosive agent for displaying slip band tissue of a shot blasting layer and a preparing method thereof. Each 100 mL of a corrosive agent solution contains 35-70 mL of H2O, 12-35 mL of hydrochloric acid, 25-55 g of FeCl3.6H2O, 1-4 g of CuCl2.H2O, 4-15 mL of nitric acid, 1-10 drops of hydrogen peroxide and 1-5 mL of bromo-geramine. According to the preparing method, distilled water is added into a beaker, and then FeCl3.6H2O and CuCl2.H2O are sequentially added and fully stirred to be dissolved uniformly; hydrochloric acid is added and stirred uniformly, then nitric acid and bromo-geramine are added, and finally hydrogen peroxide is dripped and mixed uniformly. The corrosive agent for the tissue of the shot blasting layer of the austenitic stainless steel inner wall can clearly display the tissue of the austenitic stainless steel shot blasting layer, and an optical microscope can identify the shot blasting layer of the inner wall easily under 200 folds; the form of a fragmentation layer, a crossing slip layer and a single slip layer of the shot blasting layer can be identified under 500 folds.

The invention discloses a degradable alloy and application of the degradable alloy serving as a single-slip-type soluble bridge plug. The degradable alloy comprises the following components of 60-75%of Zn, 5-15% of Mg, 5-10% of Na, 1-5% of Fe, 0.1-0.5% of C, 0.5-2% of Si, 0.5-2% of Ni and inevitable impurities, wherein the sum of mass fractions of all the components is 100%. The degradable alloyis utilized to manufacture a tool for fracturing construction, the tool is automatically melted in a pit after completing a work task and can be completely degraded, the problems of liable clamping and plugging of a channel do not exist, the degrading time is controllable, and the sealing property and pressure-bearing property are excellent.